#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# RETRIEVE ARGUMENTS
#=================================================

old_domain=$YNH_APP_OLD_DOMAIN
old_path=$YNH_APP_OLD_PATH

new_domain=$YNH_APP_NEW_DOMAIN
new_path=$YNH_APP_NEW_PATH

app=$YNH_APP_INSTANCE_NAME

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..."

# Needed for helper "ynh_add_nginx_config"
final_path=$(ynh_app_setting_get --app=$app --key=final_path)

language=$(ynh_app_setting_get --app=$app --key=language)
phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
random_key=$(ynh_app_setting_get --app=$app --key=random_key)
email=$(ynh_user_get_info --username=$admin --key=mail)
timezone="$(cat /etc/timezone)"
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name
db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before changing its URL (may take a while)..."

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Remove the new domain config file, the remove script won't do it as it doesn't know yet its location.
	ynh_secure_remove --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"

	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# CHECK WHICH PARTS SHOULD BE CHANGED
#=================================================

change_domain=0
if [ "$old_domain" != "$new_domain" ]
then
    change_domain=1
fi

change_path=0
if [ "$old_path" != "$new_path" ]
then
    change_path=1
fi

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# MODIFY URL IN NGINX CONF
#=================================================
ynh_script_progression --message="Updating NGINX web server configuration..."

nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf

# Change the path in the NGINX config file
if [ $change_path -eq 1 ]
then
    # Make a backup of the original NGINX config file if modified
    ynh_backup_if_checksum_is_different --file="$nginx_conf_path"
    # Replace locations starting with old_path
    # Look for every location possible patterns (see https://nginx.org/en/docs/http/ngx_http_core_module.html#location)
    ynh_replace_string "location\( \(=\|~\|~\*\|\^~\)\)\? $old_path" "location\1 $new_path"  "$nginx_conf_path"
    # Replace path in "return" directives
    ynh_replace_string "return \([[:digit:]]\{3\}\) $old_path" "return \1 $new_path"  "$nginx_conf_path"
    # Calculate and store the nginx config file checksum
    ynh_store_file_checksum --file="$nginx_conf_path"
fi

# Change the domain for NGINX
if [ $change_domain -eq 1 ]
then
    # Delete file checksum for the old conf file location
    ynh_delete_file_checksum --file="$nginx_conf_path"
    mv $nginx_conf_path /etc/nginx/conf.d/$new_domain.d/$app.conf
    # Store file checksum for the new config file location
    ynh_store_file_checksum --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
fi

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Modifying a config file..."

domain="$new_domain"
path="$new_path"

ynh_add_config --template="../conf/.env" --destination="$final_path/.env"
chmod 400 "$final_path/.env"
chown $app "$final_path/.env"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..."

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Change of URL completed for $app" --last